Er.......... The ZWG1120M is cold fill only. See manual here:
http://www.washingmachine-manual.com/manuals/zanussi/Zanussi_ZWG_1120_M.pdf
If it's not heating, that's a different problem!
You may find these useful:
http://www.ukwhitegoods.co.uk/help/fix-it-yourself/fault-codes/laundry-fault-codes/3337-zanussi-zwg-range-washing-machine-error-codes.html
X
June 2015